Roving frame builder motion



June 4, 1935. F. K. HENDRICKSON ROVING FRAME BUILDER MQTION Filed May 17, 1953 MN MW QM K INVENTOR.

7 ATTORNEYS.

Patented June 4, 193

ROVING FRAME BUILDER MOTION Fred K. Hendrickson, Worcester, Mass, assignor to Whitin Machine Works, Whitinsville, Mass., a corporation of Massachusetts Application May 17, 1933, Serial No. 671,549

1 Claim.

This invention relates to roving frames and'particularly to builder motions used thereon.

It is the general object of my invention to provide an improved construction in such builder motions by which reliable and safe operation is assured.

To the accomplishment of this object, my invention relates to certain arrangements andcombinations of parts which will be hereinafter described and more particularly pointed out in the appended claim.

A preferred form of the invention is shown in the drawing, in which a Fig. 1 is a side elevation'of a roving frame builder motion embodying my invention;

Fig. 2 is a detail plan view, taken along the line 22 in Fig. 1;

described.

Fig. 4 is a detail sectional elevation of certain parts, and

Fig. 5 is a side elevation showing a type of winding for which my improved builder motion is well adapted.

Referring to the drawing, I have shown parts of a roving frame comprising a fixed cross frame member ID, a vertically movable member II forming part of the bobbin carriage, an upper cone pulley I2, a lower cone pulley I3, a belt I4 connecting the pulleys I2 and I3, and a belt shipper I5 mounted on a horizontally movable rack bar I6.

The upper cone pulley I2 is mounted on a shaft I'l rotatable in a bearing I8 and rotated at constant speed by the usual driving mechanism. The lower cone pulley I3 is connected to control the speed of the bobbins, which speed is gradually reduced as the belt I4 is shifted toward the right in Fig. 1,

The shaft I1 is also provided with a bevel pinion 20 mounted at the end thereof and engaging an interrupted bevel gear 2I (Figs. 1 and 3). The gear 2| is mounted on a tumbler shaft 22 rotatable in fixed bearings 23, 24 and 25. The tumbler shaft 22 is connected through gears 26, 21, 28 and 29 to a pinion 30 which engages the teeth on the rack bar I6. Consequently, rotation of the tumbler shaft 22 causes a corresponding endwise movement of the rack bar I6 and a shifting of the belt I4 on the speed-changing pulleys I2 and I3.

An upright shaft 32 is mounted in bearings on a plate 33, which in turn is secured to a bracket 34 fixed on the carriage member I I and vertically movable therewith. The upper portion of the shaft 32 is of square cross section, as indicated at 35, and the lower portion of the shaft 32 is pro- 'heavy coil spring 50. Fig. 3 IS a plan view of an interrupted gear to be vided with right and left-hand threaded portions 36 and 31. Threaded blocks 38 and 39 are mounted on the threaded portions 36 and 31 respectively and are held from rotation relative to the bearing H :plate 33 but are at the same time slidable rela- 5 tively thereto.

The blocks 38 and 39 are provided with offset overlapping arms 40 and 4| positioned for engagement by stop plates 42 and 43 mounted on arms projecting from a hub 44 secured to the tumbler shaft-22. A collar 45 is also secured to the tumbler shaft 22 and is provided with a disc 46 on a fixed pivot 49 and yieldingly pressed against one or the other of the pins 41 by a relatively At its lower end, the tumbler shaft 22' is provided with an eccentric 52 mounted in a' transverse slot in a reversing rod 53 by which the direction of travel of the carriage member I I is controlled.

A pinion 55 is engaged by the rack I6 and is connected through gears 56 and 51 to rotate the shaft 32, previously described. The gear 51 has a square opening therein through which the square portion 35 of the shaft 32 is slidable.

The operation of the mechanism thus far described is as follows:

When the tumbler shaft 22 is held from rotation by one of the stop members 42 or 43, the pins 41 will be in the relative position indicated in Fig. 2, so that one of the pins is under pressure by the lever 48. The overlapping offset arms 40 and M move vertically with the bracket 33 and carriage member II and eventually reach positions such that the stop member 43 is clear of the lower offset arm 4| and block 39, if the movement is upward, or such that the stop member 42 is clear of the arm 40 and block 38, if the movement is downward.

In either event, as soon as the tumbler shaft 22 is free to move, the lever 48 (Fig. 2) causes an initial angular movement of the shaft 22 suflicient to engage the teeth of the pinion (Fig. 4) with the teeth of the gear 2I (Fig. 3), thereby causing the gear 2| and tumbler shaft 22 to make one-half of a revolution.

Such movement causes the second stop member 42 or 43 to engage the offset overlapping arms 40 and M and brings the second depending pin 41 to the operative position shown in Fig. 2, at which point the parts are held by the stop member 42 or 43 until a vertical movement in the opposite direction is completed and the tumbler shaft is again released. During such vertical movement, the teeth of the pinion 20 rotate idly in one of the toothless recesses of the interrupted gear 2|.

Each half revolution of the tumbler shaft 22 acts through the gears 26, 21, 28, 29 and 30 to move the rack bar I6 slightly to the right in the direction of the arrow a, producing a slight bobbin speed reduction. This movement of the rack bar also operates through the gears 55, ,56 and 51 to give the upright shaft 32 a slight angular movement, which movement also acts through the right and left-hand threaded portions 36 and 31 to draw the blocks 38 and 39 toward each other, thus shortening the vertical traverse of the carriage H and causing the yarn Y on the bobbin B (Fig. 5) to be gradually tapered at both ends of the bobbin.

Furthermore, each half revolution of the tumbler shaft 22 acts through the eccentric 52 to shift the reversing rod 53, thus causing the carriage II to move in the opposite direction.

It will be understood that the pinion 20 on the drive shaft I1 is rotating continuously, while the tumbler shaft 22 is not released at any definite point in a revolution of the pinion 20. Consequently, when the gear 2| is advanced by the spring and lever 48, the teeth of the pinion w2|) may engage the tops of the teeth on the If now the teeth of the gears 20 and 2| directly engage instead of meshing in the desired manner, the gear 2| will be forced downward against the pressure of the spring 6| until the teeth slip out of direct engagement into the correct meshing relation. Consequently the breakage of teeth previously experienced is effectually avoided.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claim, but what I claim is:

In a roving frame builder motion, a driving shaft, a driven shaft, reversing cone pulleys and a belt'constituting a variable speed drive between said shafts, a belt-shifting device, a tumbler shaft geared to actuate said belt-shifting device, a bevel pinion on said driving shaft, an interrupted bevel gear slidable on said tumbler shaft and intermittently engaged by said bevel pinion, means to stop said tumbler shaft after each half revolution and with said bevel pinion and interrupted bevel gear disengaged, yielding means to turn said bevel gear to position for engagement by said bevel pinion on release of said tumbler shaft from said stopping means, a collar fixed on said tumbler shaft and determining the operative axial position of said bevel gear, a second collar fixed on said tumbler shaft, and a spring on said tumbler shaft positioned between said bevel gear and said second collar and forcing said gear yieldingly against said first collar, said spring thereby maintaining said gear yieldingly in position for engagement-by said bevelpinion when said tumbler shaft is released, and said collars taking the entire 'end thrust of said spring in both directions.

FRED K. HENDRICKSON. 

